Grader-frame.



G. A. KELLEY.

GRADER FRAME.

APPLICATION FILED MAR.6,1913.

1,1273%. Patented Feb. 9, 1915 2 SHEETSSHEET 1.

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G. A. KELLEY.

GRADER FRAME,

APPLICATION FILBQ MAR, s, 1913.

1,127,774 Patented Feb. 9, 1915.

2 SHEETS-MEET 2.

wMa mao as akin (A121 3 "WllTED @TA GEORGE .A. KELLEY, OF J'OPLIN,MISSOURI.

GRADER-FRAME.

Application filed March 6, 1913.

T0 ([35 whom it may concern Be it known that I, GEORGE A. KELLEY, acitizen of the United States, residing at Joplin, in the county ofJasper, State of lvflissouri, have invented certain new and usefulImprovements in Grader-Frames; and I do hereby declare the following tobe a full, clear, and exact description of the invention, such as willenable others skilled in the art to which it appertains to make and usethe same.

The present invention relates to certain novel and useful improvementsin sand graders.

In carrying out my invention it is my purpose to provide a graderembodying in its construction a plurality of screenswhereby eithergravel or fine sand may be sifted.

further object of the invention is the provision of a grader having aremovable sand screen so that when itis desired to grade sand or gravel.of such coarseness that .it would not pass through the removable screenthe latter may be dispensed with and the sifting or screening carried.on by means of a second screen permanently fixed in the grader frame.

l'Vith the above recited objects and others of a similar nature in view,my invention consists in the construction, combination and arrangementof parts set forth in and falling within the scope-of the appendedclaim.

In the accompanying drawings, Figure 1 is a front view of a grader inposition for and adapted to screen gravel, the sand screen beingremoved. Fig. 2 is a view in elevation of the removable sand screen.Fig. 3 is a view in side elevation of a grader embodying the invention.Fig. 4: is a vertical longitudinal sectional view taken through thegrader with the removable or sand screen in place. F 5 is a transversesectional view taken through the grader with the two screens inposition. Fig. 6 is a perspective view of the brace leg.

In the present instance I have shown and described a grader embodyingamong other features a frame adapted to be supported in a verticallyinclined position thrmigh the medium of a pivoted brace leg. This graderis provided with a plurality of screens, one of which being a relativelycoarse screen is permanently attached to or fixed in the frame and isadapted especially for screening gravel. lVhen it is desired to screenfine sand, instead of resorting to Specification of Letters Patent.

Patented Feb. 9, 1915.

Serial No. 752,470.

the use of a separate grader, I provide a removable screen of fine meshwhich is designed to be placed in the grader frame across the face ofthe coarse screen, and held spaced apart therefrom so that the sand maybe thrown against and screened by means of the line mesh.

Referring now to the accompanying drawings in detail, the letter Aindicates the grader frame as an entirety, the latter comprising thelongitudinal side walls 11, the top wall 2 and the bottom wall or sandboard It will be seenthat thetop wall is substantially equal in heightto the height of the side walls and forms an inclosure between thesame,.while the bottom or sand board forms a chute or guideway in conjunction with the adjacent portion of the side walls. Attached to therear longitudinal edges of the side walls are the strips 92 whichproject inward of such side walls so as to form flanges, while 5indicates a simi lar strip attached to the back edge of the top wall andextending inward to form a flange which lies between the side strips orflanges Similarly a strip 6 is fastened to the upper back portion of thesand board and forms a flange extending between the lower end portionsof the side strips or flanges Permanently fastened to the back of thisframe is a. gravel screen g formed of relatively large mesh, and in thepresent instance 1 construct this screenof a series of longitudinallyextending parallel wires 7, which have their upper terminals secured asat 8 to the back of the strip 5 while their lower terminals are fastenedas at 9 to the back of the bottom strip 6. These longitudinal wires arein turn crossed by a series of transverse wires 10 which have theirterminals secured in the back of the side strips H as at 11. It is to beunderstood that this gravel screen may be of any coarseness or size ofmesh to suit particular conditions, and the mesh may be constructed andsecured in any desired manner.

The brace leg for supporting the grader frame consists of a pair ofparallel bars 121?- which are pivoted at their upper ends as at 13 toopposite upper end portions of the screen frame. The rear longitudinaledges of each of these bars is provided with a flange strip 14 whichterminates short of the pivot point of the bar to which it is attachedas is shown at 15. These flange strips for the leg are so arranged, thatwhen the latter is moved parallel to the grader frame or to its closedposition they will abut against the rear of such frame and form stopsfor the leg.

The numeral 16 indicates a transverse brace bar connecting the flanges14: at their top portions while 17 indicates a similar brace bar at thelower portion of the leg. These two bars tend to strengthen and bracethe supporting leg of the grader frame. The lower end of each leg ispreferably beveled or reduced as at 17, and is provided with a spike orsharpened stud 18 for penetrating the ground and anchoring the graderfirmly in position. In order to limit the outward movement or throw ofthe brace leg I provide at the top of the screen frame a stop bar 19while 20 designates a tie chain having one end connected to the ring 21carried by the metallic cross rod or wire 22, the opposite end of saidchain being connected to the staple or eye 23 on the lower cross bar 17.

When it is desired to screen coarse sand mixed with gravel, or gravelalone, the structure just described as embodying the permanent screen isemployed in the well known manner. WVhen, however, it is the purpose toscreen sand such as is used for mortar and similar purposes, I make useof the removable sand screen 8 which is shown in detail in Fig. 2. Thisscreen comprises an approximately rectangular unitary frame 24 formed ofiron piping or rod. This frame is covered with a screen 25 of relativelyfine mesh. This removable screen is further braced by means of the longwire 26 and the cross wires 27. When it is intended to use thisremovable screen, the latter is placed in the grader frame over and infront of the coarse screen so that when in operative position itsrectangle rests against the side strips or flanges 44 and the top andbottom strips or flanges 5 and 6 of the grader frame. Thus the screenwhile securely supported will be held spaced apart from the coarsescreen the width of the flanges upon which it rests. It will of coursebe evident that when the sand to be screened is thrown up against thefine mesh it will pass therethrough and through the coarse mesh, thegravel or other material screened out from the sand dropping down on thesand board to the ground. The frame of the fine screen 5 should be ofsuch size and construction as to snugly and tightly fit within thegrader frame and in order that it may be readily removed therefrom asmall pulling chain or cord 27 may be attached to one of the transversesides of the frame 24; for this purpose. It will be seen that when boththe screens are used, the device performs the function of a grader, forwhen the material to be screened is thrown thereagainst the finerparticles will pass through these screens, while the coarser particleswill be caught by the fine screen and directed down to the sand board.This device will be found especially adapted for use in screening sandand gravel such as is employed in building operations, the manufactureof mortar and other similar purposes.

Vhile I have herein shown and described one particular embodiment of myinvention I Wish it to be understood that I do not confine myself to allthe precise details of construction herein set forth by way ofillustration, as modification and variation may be made withoutdeparting from the spirit of the invention or exceeding the scope of theappended claim.

What I claim is:

In an apparatus of the class described, the combination with a frameincluding side walls, a top wall, and a bottom board, of flanges at therear of the frame and extending inward thereof, a relatively coarsescreen permanently attached to the rear of the flanges, a relativelyfine removable screen located within the frame and adapted to rest onthe front faces of the flanges and to be held spaced apart from thecoarse screen by such flanges, said fine screen being confined againstlongitudinal movement by the top wall and the bottom board and againstlateral movement by the side walls of the frame, and a support for theframe.

In testimony whereof, I affix my signature, in the presence of'twowitnesses.

GEORGE A. KELLEY.

WVitnesses O. M. PnALnR, S. P. SHARP.

Copies of this uatent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. C.

